MI-5 try to stop a ruthless City financier who is out to force the collapse of a major bank. Manipulating the market is Alexis Maynell's specialty. Ros Myers goes underco ...

MI-5 is approached by Mohammed Khordad, the number 3 man in Al Qaeda, for a meeting. Under normal circumstances, they wouldn't even think of meeting the leader of a terro ...

When a Pakistani agent informs them that there is an Al Qaeda cell planning an attack in London, MI-5 go into action. They already have an agent in place in the terrorist ...

Convinced that his Russian counterpart in London, Arkady Katchimov, is behind the Al Qaeda bombing that killed Adam Carter, Harry Pearce launches an unauthorized investig ...

MI-5 is having a particularly busy day. They have just exchanged spies with the Russians and welcome the return of Lucas North after 7 years of imprisonment. Harry Pierce ...

War with Iran finally averted, the team learn that a London school will be the target of hardliners resisting the new peace. Simultaneously they discover that their lost ...

After Yalta's attack on their satellite network, America is planning air-strikes on Iranian nuclear facilities. Harry's team are suspended from the Grid following the Ros ...

Ros's relationship with Yalta is revealed. With limited options, she turns herself in, but convinces Harry that his best option is to send her back out as a double agent. ...

Knowing that Iran now has the nuclear triggers to complete their armament program, Harry Pearce convinces his CIA counterpart Bob Hogan that the time has come to seriousl ...

Adam and Ros board an airplane to identify a courier carrying nuclear weapons technology to Iran. Jo and Malcolm race to prevent the poisoning of London's water supply wh ...

MI-5 has Sergei Valentino, a freelance Russian, under observation from the moment he enters Britain. He has in his possession blueprints for a nuclear trigger which they ...

Abdul Kharami is a suspected terrorist who is under constant surveillance but manages to evade his watchers just as MI-5 receives reliable information that he may be read ...

The crash of a cargo airplane near a secret US army base diverts MI-5's attention from the Iran situation. The Ministry of Defense has put out press releases saying it wa ...

With the virus spreading, Harry Pearce decides to take extraordinary action to find out who might have an antidote. They determine that one of four countries likely has i ...

Just as the British launch a peace process meant to stabilize its relations with Iran, MI-5 learn that a rogue Iranian intelligence officer, Megan Asnik , may be plotting ...

Environmental terrorists take control of the Thames barrier just as a major storm surge threatens to flood the London area. They demand that the British government publis ...

Adam Carter finds himself hunting for a onetime friend, Richard Dempsey, when Harry Pearce orders the man assassinated. Dempsey was once an agent but apparently went over ...

Harry Pearce is less than pleased when he learns that MI-5 video surveillance of a suspected terrorist, Khalid Mansour, has been ruled inadmissible and that Mansour will ...

A group of terrorists take the occupants of the Saudi-Arabian trade center hostage threatening to kill one person every hour until their demand for the release of certain ...

The UK government's decision to sell nuclear reactors to Saudi Arabia raises many concerns in the the various services but MI-5's immediate concern is that one of four Sa ...

Ruth Evershed finds herself in the middle of an investigation when a man for whom she provided change at a tube station commits suicide by jumping in front of the train. ...

Zaf is undercover with a group of Al Qaeda terrorists who plan on exploding a thermobaric bomb in central London. Adam's solution is to buy the bomb before the terrorists ...

Juliet Shaw was severely injured in the attempt on their lives and is recovering in hospital. The third planned attack - having two commercial airliners collide in mid-ai ...

Adam survives the assassination attempt by Angela Wells but while he is in hospital recovering, major terrorist attacks are directed against fuel depots crippling British ...

Harry Pearce and the entire team are taken prisoner by a retired ex-agent, Angela Wells, who believes she has evidence that the British security services killed Princess ...

Harry Pearce is suspended from duty when he refuses to let the CIA forcibly extradite - meaning kidnap - a UK citizen who is suspected of being a terrorist. Harry is just ...

Still in shock and unable to properly grieve, Adam Carter insists that he must return to work and keep himself occupied. Harry Pearce isn't so sure and he has Adam monito ...

Fiona Carter goes undercover when MI-5 receives a report that the Syrian Foreign Minister may be prepared to provide the British with information. She and Jo Portman repr ...

When MI-5 learn that Nazim Malik, a suspected terrorist who has been held without trial for two years, is planning a terrorist attack, Harry Pierce arranges for him to be ...

When a retired senior member of the Security Service, Clive McTaggart, is found dead in his home, it's put down to suicide. The man had been suffering from cancer so suic ...

After an agent is killed in Istanbul, MI-5 fears that a known terrorist, Yazdi, is trying to infiltrate the UK to stage an attack. The agent in Istanbul had identified a ...

When 6 local Councillors in East London switch their allegiance to the right-wing British Way party, there is fear of race rioting in the area. MI-5 is called in to deter ...